UPL - User Program Language

UPM - User Profile Management

UPM - Update Process Model

UPP - Universal Payment Preamble

UPS - Uninterruptible Power System

UPS - Uninterruptible Power Supply

UQBL - Unsupervised QBL

UR - Universal Relation

UR/FM - User Role Function Matrix

URC - Uniform Resource Citation

URC - Uniform Resource Characteristics

UREP - Unix RSCS Emulation Protocol

URFM - User Role Foundation Matrix

URI - Uniform Resource Identifier

URL - Uniform Resource Locator

URN - Universal Resource Names

US - Universal Server

US - Unit Separator

USART - Universal Synchronous / Asynchronous Receiver / Transmitter

USB - Universal Serial Bus

USENET - User's Network

USG - Unix Support Group

USOC - Universal Service Ordering Code

USR - "US Robotics

USRT - Universal Synchronous Receiver - Transmitter